I would like to propose improvements for the Android client. Since this platform dominates the market is very important to improve the client at least at the point of the features availables for WP or IOS, like to view presentable content. Also joining a meeting using Lync 2013 mobile does not work. It send you to Play Store to download 2010 version.
In addition all the mobile clients are lacking essential features like be able to join Persistent groups.
Thank you for the opportunity